Graco 24M178 User Manual

Maintenance and Repair 

The following is a basic pressure relief procedure. Be 
sure to follow the specific pressure relief procedure in 
your spray gun and/or fluid supply equipment manuals.

1.

Close the main air shut-off valve.

2.

Trigger the gun or dispense valve and open any 
drain valves to relieve pressure.

To maintain maximum filtering efficiency and avoid 
excessive pressure drop, the filter must be kept clean. 
See Manual 309919 for cleaning and parts information.

See Manual 309919 for operation, cleaning, and parts 
information.

WARNING

To avoid injury, relieve air and fluid pressure before 
checking, cleaning, or repairing the equipment.

•

Relieve the pressure before cleaning, checking 
or repairing. Follow Pressure Relief Proce-
dure, above.

•

Check system at least once per shift to ensure 
proper drainage.

•

A supply of low flow/low humidity air will pro-
vide longer desiccant life.

NOTE: It is recommended that Air Filter 234402 be 
installed upstream of the coalescing filter to 
remove 3 micron and larger size particles and sep-
arate large droplets of moisture from the air line.

Never let the liquid level in the bowl reach the base of 
the coalescing element.